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MicroLab MK8 Service Manual

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6. Author Checked Approved Date Date Date MicroLab MKS Service Manual 085 46 Issue 1 0 July 2006 Micro Medical Contents MicroLab System overview MicroLab Mk8 System Bidirectional Transducer MicroLab mk8 Repair Disassembling the MicroLab for repairs Re assembling the MicroLab after repairs Circuit description Micro Computer Unit Overview Microcontroller Powers Supply Microlab8 Sensor Interface Keypad EEPROM MOUSE RTC RS232 Printer Driver Display Driver Sounder USB Driver Memory MicroLab Parts List Technical support Fault analysis Specifications Circuit diagrams Overview Microcontroller Powers Supply Microlab8 Sensor Interface Keypad EEPROM MOUSE RTC RS232 Printer Driver Display Driver Sounder USB Driver Memory 085 01 085 02 085 03 085 04 085 05 085 06 085 07 085 08 085 09 085 10 085 00 085 01 085 02 085 03 085 04 085 05 085 06 085 07 085 08 085 09 085 10 Page 3 Page 3 Page 4 Page 5 Page 5 Page 5 Page 6 Page 6 Page 6 Page 6 Page 6 Page 7 Page 7 Page 7 Page 8 Page 8 Page 8 Page 8 Page 9 Page 18 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 MicroLab System Overview MicroLab MK8 System The Micro Medical MicroLab is a data recording spirometer consisting of a microcomputer unit incorporating a high resolution colour touch screen Inte
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9. 1uF 25V ceramic capacitor size 0805 0 47uF 25V ceramic capacitor size 0805 2 2uF 25V ceramic capacitor size 0805 1uF 25V ceramic capacitor size 0805 AVX 33uF 16v surface mount Tantalum Farnell 301 8544 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 AVX 100uF 16v Surface mount Tantalum Farnell 197 348 0 1uF 25V ceramic capacitor size 0603 13 C40 C41 C43 C44 CAP 0 1UF0603 CAP 0 1UF0603 CAP TAJD107K016R CAP 820PF0603 Parts List For MicroLab MK8 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 AVX 100uF 16v Surface mount Tantalum Farnell 197 348 820pF ceramic capacitor size 0603 Drawing No 085 00 Date 12 12 05 Revision No 1 2 Designation Part No F Farnell Page 5 OF 7 Description C45 C46 C47 C48 C49 C50 C51 C52 C53 C54 C55 C56 C57 C58 C59 C60 C61 C62 C63 C64 C66 C67 C68 C69 C70 C71 C72 C73 C74 C75 C76 C77 C78 C79 C80 C81 C83 C84 C85 C86 C87 C88 C89 C90 C91 CAP 820PF0603 CAP 820PF0603 CAP 820PF0603 CAP 10NF0603 CAP 0 1UF0603 CAP 33PF0603 CAP 33PF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CA
10. Digital Volume 10ml volume 0 03 5 flow 396 to ATS recommendations Standardisation of Spirometry 1994 update for flows and volumes 2000 patients with tests including Flow Volume loops and Volume Time For the latest listing of compatible Hewlett Packard printers visit Micro Website at www micromedical co uk 13mm s avg Input 100 240V AC 50 60Hz Output 12V 2 5A Rechargeable NiMH 8 4V 1Ah 25 5cm x 12cm x 3 5cm Transducer 50 x 60 x 90mm Excluding any transducers 630g The instrument will operate in a uniform environment of 0 C 40 C out of 30 90 non condensing 20 C to 70 C 10 to 90 RH RS232 serial and USB 1 1 0c 8 L Tang PRG UN STEIN 010 119345 9002 1588 D 10580 10580580 anasnos 495 L0 680 9 AN We EE EC d UD 488 BER ong SO 4501 580 80 ADS 60 580 aud 8801 705 vas 2110 asnon 1100 5 ZNI SON 19520580 TNT aSNOW 3 AJ XI TECH LESA A WON med m in VOS 90 680 Dud tem VIVIINDM 1
11. side Turn the unit face up before easing the upper and lower mouldings apart Remove the paper cover and side panels Taking all precautions against static damage lift the MicroLab PCB battery and printer assembly out of the bottom moulding and place on an antistatic work surface Reconnect the power supply to the MicroLab charging socket The MicroLab is now ready for fault finding Reassembling the MicroLab after repairs 1 Disconnect all mains power supplies Place the MicroLab PCB and printer battery if connected into the MicroLab bottom moulding Insert the Left hand side panel into the bottom moulding Insert the Right hand side panel into the bottom moulding and onto the ML8 PCB connectors by lifting the right hand edge of the PCB slightly Ensuring that the keys do not fall out position the top moulding over the bottom moulding and ensure that they both mate correctly Lift the rear of the top moulding to insert the paper cover hinge pins clip the paper cover shut We recommend that you use a Pozidriv No 1 screwdriver for the following instruction Place the MicroLab face down on a soft surface and replace the six screws in the lower moulding The MicroLab is now ready for operation Circuit Descriptions Microcomputer Unit Overview 085 01 and Micro controller 085 02 The drawing 085 01 is a hierarchical block diagram showing the connections of the sub sections The rest of
12. size 0603 AVX 33uF 16v surface mount Tantalum Farnell 30 0 1uF 25V ceramic capacitor size 0603 AVX 33uF 16v surface mount Tantalum Farnell 30 2 2uF 25V ceramic capacitor size 0805 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 1uF 25V ceramic capacitor size 0805 1uF 25V ceramic capacitor size 0805 22pF ceramic capacitor size 0603 22pF ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0805 2 2uF 25V ceramic capacitor size 0805 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 14 8544 8544 8544 8544 C92 C93 C94 C95 C96 C97 C98 C99 C100 C101 C102 C103 C104 C105 C106 C107 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 1UF0805 CAP 0 1UF0805 CAP EEVFK1C470UR CAP 0 1UF0603 CAP TAJD107K016R CAP 0 1UF0603 CAP TPSC336K16R0300 CAP 0 1UF0603 CAP TPSC336K16R0300 CAP 0 1UF0603 CAP 0 1UF0603 Parts List For MicroLab MK8 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 1uF 25V ceramic capacitor size 0805 0 1uF 25V ceramic capacitor size 0805 Panasonic 47uF electrolytic UWX5 package Farnell 383 5856 0 1
13. the drawings are sub sections and are described in detail below U1 is a Sharp LH79520 32 bit microprocessor with 32K of Cache Ram and no internal flash memory The system clock is supplied by 14 7456MHz crystal X1 U2 is a reset controller which holds the reset line low on power up J1 is the JTAG interface for programming the unit JP1 is the jumper that must be in place for programming and removed for normal use U3 is a multiplexer used to direct the communications to the correct channel on UART1 The directions are printer MM Sensor 1 and MM Sensor 2 Power Supply 085 03 The power to the system is either supplied by the 8 4V NiMH battery or from an external 12V DC regulated power supply If the external supply is connected then TR6 amp TR12 are switched off and the battery is not used R8 ensures that the battery is trickle charged at all times U40 is the charging circuit for the NiMH battery The typical charge charge current is about 500mA which equates to about 375mA out of the 12V supply Charging is disabled when the unit turns on with TR23 U4 is a step down switching regulator used to create the 3 3 and 1 8 volt rails U6 is a step down switching regulator used to create the 5V rail U43 is a 1Hz oscillator used to blink the LED when the battery is charging If the battery is fully charged CHARGE is high and the LED is on assuming the mains is plugged in U33 is the power on circuit If the unit is off and
14. 1000 Zetex Schottky diode SOT 23 package D4 DIO ZHCS1000 Zetex Schottky diode SOT 23 package D5 LED L 934ND Kingbright 3mm orange LED Farnell 329 9478 D6 DIO ZHCS1000 Zetex Schottky diode SOT 23 package D7 DIO BAT54S General purpose Dual Schottky diode in Series D8 DIO BAT54S General purpose Dual Schottky diode in Series D9 DIO BAS21 General purpose diode D10 DIO BAS21 General purpose diode D11 DIO ZHCS1000 Zetex Schottky diode SOT 23 package D13 DIO ZHCS1000 Zetex Schottky diode SOT 23 package D14 DIO SMAJ12A General Semiconductor TVS 12V protection diode 214 package D15 DIO BAS21 General purpose diode D16 DIO BAS21 General purpose diode D17 DIO BAS21 General purpose diode IND NLC565050T L1 3R9K PF TDK 3 9uH inductor IND NLC565050T L2 3R9K PF TDK 3 9uH inductor 15 13 15 16 17 18 19 x1 X2 X3 F1 F2 BAT1 BAT2 J1 J2 J3 J4 J5 J6 J7 J8 J9 J10 J12 J13 J14 JP1 IND B82462 G4103 M IND LQH32CN100K33L IND B82462 G4223 M IND LQH32MN220J23L IND LQH32CN100K33L IND BLM41PG750SN1B IND DO3340P 103ML XTL 14 745HC49 4H XTL 32 768WATCH XTL 14 745HC49 4H XTL CS1012 000MABJTR FUS MINISMD050 2 FUS MF SM150 2 SKT B2B PH K S BAT CR2430PCB CON M20 9980706 CON CN06486 0172 4 55 0172 4 55 CON MJ2135 Not Used 12 228 18 55 12 508 0 58 55 SPK KDM 40016 CON 56579 0588 CON 52852 0470 CON RP34L5R 3PD 71 CON 52852 0470 CON
15. 3K Surface mount resistor 0 063 watt 1 size 0603 1M Surface mount resistor 0 063 watt 1 size 0603 18K Surface mount resistor 0 125 watt 1 size 0805 100K Surface mount resistor 0 125 watt 1 size 0805 100K Surface mount resistor 0 063 watt 1 size 0603 0 22R Surface mount resistor 0 25 watt 1 size 0805 604K Surface mount resistor 0 063 watt 1 size 0603 100K Surface mount resistor 0 063 watt 1 size 0603 100K Surface mount resistor 0 063 watt 1 size 0603 121R Surface mount resistor 0 063 watt 1 size 0603 560R Surface mount resistor 0 125 watt 1 size 0805 100K Surface mount resistor 0 063 watt 1 size 0603 100K Surface mount resistor 0 063 watt 1 size 0603 100K Surface mount resistor 0 063 watt 1 size 0603 100K Surface mount resistor 0 063 watt 1 size 0603 0 1R Surface mount resistor 0 25 watt 1 size 0805 100K Surface mount resistor 0 063 watt 1 size 0603 0 1R Surface mount resistor 0 25 watt 1 size 0805 100K Surface mount resistor 0 063 watt 1 size 0603 100K Surface mount resistor 0 063 watt 1 size 0603 100K Surface mount resistor 0 063 watt 1 size 0603 100K Surface mount resistor 0 063 watt 1 size 0603 100K Surface mount resistor 0 063 watt 1 size 0603 100K Surface mount resistor 0 063 watt 1 size 0603 100K Surface mount resistor 0 063 watt 1 size 0603 22K Surface mount resistor 0 063 watt 1 size 0603 Drawing No 085 00 Date 12 12 05 Revision No 1 2 Page 4 OF 7 Designation Part No F Farnell Desc
16. 4 HO IE CHA y t 0 3 1d 9 Yd 1 sao 6F 20 9d Is id t st e OF ud o fid os ta rid
17. M20 9990206 Parts List For MicroLab MK8 Epcos 10uH Power Inductor Farnell 7430027 muRate 10uH inductor 1210 package Farnell 9522204 Epcos 22uH Power Inductor Farnell 7430043 muRate 22uH inductor 1210 package Farnell 9522069 muRate 10uH inductor 1210 package Farnell 9522204 muRata inductor 1806 package Coilcraft 10uH inductor 14 745 MHz crystal HC49 4H package Seiko C 001R 32 768 KHz crystal WATCH package Farnell 571672 14 745 MHz crystal HC49 4H package Citizen 12MHz surface mount crystal Digi Key 300 8089 1 ND Tyco 0 5A surface mount Polyswitch RS 136 864 Bourns Surface Mount 3 Amp Resettable Fuse JST 2 way PCB socket Varta 260mA hr PCB mounted coin cell battery Farnell 425345 Harwin 7x2 way 2 54mm pitch Header CPC DC Power Socket Hirose 4 way connector Hirose 4 way connector 3 5mm 4 pole Jack Socket Farnell 5096297 Printer Debug Port Hirose 22way connector Hirose 50way connector Roxborough speaker Molex USB Mini AB connector Molex 4 way 1mm pitch FFC connector Hirose 3 way connector Molex 4 way 1mm pitch FFC connector Harwin 2 way 2 54mm pitch Header Farnell 511705 Drawing No 085 00 Date 12 12 05 Revision No 1 2 Page 7 OF 7 Designation Part No F Farnell Description KEYO SWT TSS644R Knitter switch switch KEY1 SWT TSS644R Knitter switch switch KEYS3 SWT TSS644R Knitterswitch switch VR1 POT 3150W203P Tyco Electronics 20K surface mount pot Farnel
18. P 0 1UF0603 CAP 10NF0603 CAP 10NF0603 CAP 10NF0603 CAP 10NF0603 CAP 1UF0805 CAP 2 2UF0805 CAP 0 1UF0603 CAP TPSC336K16R0300 CAP TPSC336K16R0300 CAP 1UF0805 CAP 0 1UF0603 CAP TPSC336K16R0300 CAP 0 1UF0603 CAP TPSC336K16R0300 CAP 2 2UF0805 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 1UF0805 CAP 1UF0805 CAP 22PF0603 CAP 22PF0603 CAP 0 1UF0805 CAP 2 2UF0805 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 820pF ceramic capacitor size 0603 820pF ceramic capacitor size 0603 820pF ceramic capacitor size 0603 10nF ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 ceramic capacitor size 0603 ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 10nF ceramic capacitor size 0603 10nF ceramic capacitor size 0603 10nF ceramic capacitor size 0603 10nF ceramic capacitor size 0603 1uF 25V ceramic capacitor size 0805 2 2 25V ceramic capacitor size 0805 0 1uF 25V ceramic capacitor size 0603 AVX 33uF 16v surface mount Tantalum Farnell 30 AVX 33uF 16v surface mount Tantalum Farnell 30 1uF 25V ceramic capacitor size 0805 0 1uF 25V ceramic capacitor
19. R0805 RES 100K0603 RES 10K0603 RES 10K0603 RES 0 1R0805 RES 0 1R0805 RES 0 1R0805 RES 3 3K0603 RES 1M0603 RES 18K0805 RES 100K0805 RES 100K0603 RES 0 22R0805 RES 604K0603 RES 100K0603 RES 100K0603 5 121 0603 RES 560R0805 RES 100K0603 RES 100K0603 RES 100K0603 RES 100K0603 RES 0 1R0805 RES 100K0603 RES 0 1R0805 RES 100K0603 RES 100K0603 RES 100K0603 RES 100K0603 RES 100K0603 RES 100K0603 RES 100K0603 RES 22K0603 Parts List For MicroLab MK8 100K Surface mount resistor 0 063 watt 196 size 0603 10K Surface mount resistor 0 063 watt 196 size 0603 10K Surface mount resistor 0 063 watt 196 size 0603 1M Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 1 5K Surface mount resistor 0 063 watt 196 size 0603 33R Surface mount resistor 0 063 watt 196 size 0603 33R Surface mount resistor 0 063 watt 196 size 0603 15K Surface mount resistor 0 063 watt 196 size 0603 15K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 0 1R Surface mount resistor 0 25 watt 1 size 0805 100K Surface mount resistor 0 063 watt 196 size 0603 10K Surface mount resistor 0 063 watt 196 size 0603 10K Surface mount resistor 0 063 watt 196 size 0603 0 1R Surface mount resistor 0 25 watt 1 size 0805 0 1R Surface mount resistor 0 25 watt 1 size 0805 0 1R Surface mount resistor 0 25 watt 1 size 0805 3
20. R12 TR13 TR14 TR15 TR16 TR17 TR18 TR19 TR20 TR21 TR22 R1 R2 R3 TRA DTC114EK TRA DTC114EK TRA DTC114EK TRA FMMT491A TRA DTA114EK TRA FDN360P TRA FDN360P TRA FDN360P TRA DTC114EK TRA DTC114EK TRA FDN360P TRA DTC114EK TRA FDN360P TRA DTC114EK TRA FMMT491A TRA FDN360P TRA FDN361AN RES 5 6K0603 RES 75R0603 RES 10K0603 Parts List For MicroLab MK8 High speed switching NPN transistor size SOT23 High speed switching NPN transistor size SOT23 High speed switching NPN transistor size SOT23 Zetex NPN transistor size SOT 23 High speed switching PNP transistor size SOT23 Fairchild Semiconductor P channel Mosfet size SOT 23 Fairchild Semiconductor P channel Mosfet size SOT 23 Fairchild Semiconductor P channel Mosfet size SOT 23 High speed switching NPN transistor size SOT23 High speed switching NPN transistor size SOT23 Fairchild Semiconductor P channel Mosfet size SOT 23 High speed switching NPN transistor size SOT23 Fairchild Semiconductor P channel Mosfet size SOT 23 High speed switching NPN transistor size SOT23 Zetex NPN transistor size SOT 23 Fairchild Semiconductor P channel Mosfet size SOT 23 Fairchild Semiconducter N channel Mosfet size SOT 23 5 6K Surface mount resistor 0 063 watt 196 size 0603 75R Surface mount resistor 0 063 watt 196 size 0603 10K Surface mount resistor 0 063 watt 196 size 0603 Drawing No 085 00 Date 12 12 05 Revision No 1 2 Page 2 OF 7 Designat
21. R8 are used to drive the data lines low BAT2 is a lithium coin cell to give the RTC power for up to 10 years U10 is the RTC and is clocked by a 32 768kHz xtal D2 enables power to be drawn from the main 3 3V regulator when the unit is on U25 is a 32Kbyte EEPROM This is used to store general settings and calibrations The uC communicates with the PC an RS232 serial interface at 115 200 Kbits per sec baud rate with 8 bits data 1 stop bit and no parity U9 converts the RS232 signal to a logic signal of 3 3V The uC uses channel 0 of it s inbuilt serial controller for 232 communication Printer Driver 085 06 The printer driver circuit is controlled by a Hitachi H8 3687 microprocessor It includes the head driver the motor driver and the paper detection The microprocessor has a built in Flash which needs to be programmed by the main microcontroller in order for the printer driver to operate correctly U12 is used to drive the correct signals to rotate the motor U13 is used to translate the communication levels from 3 3 to 5V 1 is to turn off the 5V supply to the printer when not required U7 is a linear regulator for the 7V printer head voltage J7 is the connector for the head J14 is the connector for paper detection J6 is used for debugging the printer and should never even be populated in production J12 is the connector for the motor Display Driver 085 07 The 3 5 TFT LCD Display is driven directly by the m
22. ace mount resistor 0 063 watt 1 size 0603 R26 RES 100K0603 100K Surface mount resistor 0 063 watt 1 size 0603 R27 RES 0 1R0805 0 1R Surface mount resistor 0 25 watt 1 size 0805 R28 RES 1K0603 1K Surface mount resistor 0 063 watt 1 size 0603 R29 RES 0 1R0805 0 1R Surface mount resistor 0 25 watt 1 size 0805 R30 RES 10K0603 10K Surface mount resistor 0 063 watt 1 size 0603 10 R31 R32 R33 R34 R35 R36 R37 R38 R39 R40 R41 R42 R43 R44 R45 R46 R47 R48 R49 R50 R51 R52 R53 R54 R55 R56 R57 R58 R59 R60 Re1 R62 RES 100K0603 RES 100K0603 RES 100K0603 RES 100R0603 RES 0 1R0805 RES 10M0805 RES 100K0603 RES 10K0603 RES 0 1R0805 RES 10K0603 RES 10K0603 RES 10K0603 RES 10K0603 RES 100K0603 RES 10K0603 RES 100K0603 RES 10K0603 5 1 0603 5 1 0603 5 1 0603 5 1 0603 RES 33K0603 RES 33K0603 RES 100K0603 RES 100K0603 RES 100K0603 RES 100K0603 RES 100K0603 RES 100K0603 RES 22K0603 RES 22K0603 RES 22K0603 Parts List For MicroLab MK8 100K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 100R Surface mount resistor 0 063 watt 1 size 0603 0 1R Surface mount resistor 0 25 watt 1 size 0805 10M Surface mount resistor 0 125 watt 196 size 0805 100K Surface mount resistor 0 063 watt 196 size 0603 10K Surface mount resistor 0 063 watt 196 size 0603 0 1R Surface mount resistor 0 25 watt 1
23. ain microcontroller The display has a built in touch screen and LED backlight all on the same connector J8 U28 and U29 are used to invert 2 lines from the processor U14 is the touch screen controller U16 controls a constant current through the LED backlight of the display U15 can adjust the current to which U16 has to control U17 is a step up switching regulator used to create the appropriate voltages for the display AVDD approx 8V VGH approx 15V VGL approx 8 Sounder 085 08 The sound driver includes a low pass filter a digital potentiometer and an amplifier The low pass filter R100 and C110 turn the PWM digital signal from the microcontroller into an analog voltage The digital potentiometer U18 is used to adjust the volume and the amplifier U19 is used to drive the 16ohm speaker with the final signal USB Driver 085 09 The cypress SL811HST U20 is a host slave USB controller which can be used for communicating with a PC or an external printer In host mode 5V power is supplied through TR13 and switched on with TR14 The chip has is clocked by a 12MHz crystal X4 Memory 085 10 U23 is a 32Mbyte FLASH 28F256P30 used to store all program code and the files filing system U24 is a 2Mbyte SRAM CY62167DV30 used to store all volatile memory such as video memory and program memory MicroLab Parts List Parts List For MicroLab MK8 Drawing No 085 00 Da
24. ing seal The LED s produce infrared beams which are interrupted by the vane twice per revolution This interruption is sensed by the phototransistors The output from the collector of each phototransistor will be a square wave with a phase difference between the two of or 90 degrees depending upon the direction of flow The square waves are detected by a microprocessor that measures the period of each pulse and transmits that information to the main unit via a high speed asynchronous serial link There is no routine maintenance required for the transducer other than cleaning according to the instructions in the operating manual Micro Medical Digital Volume Transducer Rotating Infrared Swirl Jewelled vane emitter plate bearing Oo Gace dass _____ Infra red detector Volume k X No of pulses Volume proportional to the number of pulses Flow proportional to the frequency Flow k pulse period MicroLab Mk8 Repair Disassembling the MicroLab Mk8 for Repairs 1 2 Disconnect the mains power supply Open the printer cover and remove the paper roll from the unit We recommend that you use a Pozidriv No 1 screwdriver for the following instruction Place the MicroLab Mk8 face down on a soft surface to remove the six screws in the lower moulding Put the screws to one
25. ion Part No F Farnell Description R4 RES 10K0603 10K Surface mount resistor 0 063 watt 1 size 0603 R5 RES 10K0603 10K Surface mount resistor 0 063 watt 1 size 0603 R6 RES 10K0603 10K Surface mount resistor 0 063 watt 1 size 0603 R7 RES 10K0603 10K Surface mount resistor 0 063 watt 1 size 0603 R8 RES 1K0805 1K Surface mount resistor 0 125 watt 1 size 0805 R9 RES 1M0603 1M Surface mount resistor 0 063 watt 1 size 0603 R10 RES 100K0603 100K Surface mount resistor 0 063 watt 1 size 0603 R11 RES 100K0603 100K Surface mount resistor 0 063 watt 1 size 0603 R12 RES 100R0603 100R Surface mount resistor 0 063 watt 1 size 0603 R13 RES 100K0603 100K Surface mount resistor 0 063 watt 1 size 0603 R14 RES 22K0603 22K Surface mount resistor 0 063 watt 1 size 0603 R15 RES 1M0603 1M Surface mount resistor 0 063 watt 1 size 0603 R16 RES 432K0603 432K Surface mount resistor 0 063 watt 1 size 0603 R17 RES 100K0603 100K Surface mount resistor 0 063 watt 1 size 0603 R18 RES 36K0603 36K Surface mount resistor 0 063 watt 1 size 0603 R19 RES 22K0603 22K Surface mount resistor 0 063 watt 1 size 0603 R20 RES 22K0603 22K Surface mount resistor 0 063 watt 1 size 0603 R21 RES 27K0603 27K Surface mount resistor 0 063 watt 1 size 0603 R22 RES 0 1R0805 0 1R Surface mount resistor 0 25 watt 1 size 0805 R23 RES 0 047R0805 0 047R Surface mount resistor 0 25 watt 1 size 0805 R24 RES 100K0603 100K Surface mount resistor 0 063 watt 1 size 0603 R25 RES 47K0603 47K Surf
26. ional transducer cable and connector for damage The unit does not record any blows Inspect Bi directional transducer cable and connector for damage Ensure that the Bi directional transducer is correctly plugged into the MicroLab Remove turbine from the Bi directional transducer housing Taking the turbine move it slowly through the air and check that the vane is not sticking Specifications Spirometry Measurements Forced VC FEV 75 FEV1 FEV3 FEV6 FVC PEF FEV 75 VC FEV 75 FVC FEV1 VC FEV1 FVC FER FEV3 VC FEV3 FVC FEV 75 FEV6 FEV1 FEV6 FEF25 MEF75 FEF50 MEF50 FEF75 MEF25 FEF25 75 MMEF FEF50 VC FEF50 FVC MMEF FVC FEF25 75 FVC FIV1 FIVC PIF FIV1 FIVC FIR FIF25 MIF75 FIF50 MIF50 FIF75 MIF25 R50 FEF50 FIF50 25 75 FET MVV ind Measurements relaxed EVC IVC IC VT TV Ti Te Ti Ttot VT Ti TV Ti IRV ERV FR Test Per Subject Predicted Values Transducer Resolution Accuracy General Storage graphs Printer Output Medical External Printers Printer Output internal Printer Power Supply Battery Pack Dimensions Weight Operating Temperature direct sunlight Operating Humidity Storage Temperature Storage humidity Connectivity 5 relaxed VC manoeuvres and 8 forced manoeuvres for each baseline and two post examinations Various depends upon national preference including NHANESIII Micro Medical Gold Standard Bi Directional
27. istor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 0 1R Surface mount resistor 0 25 watt 1 size 0805 33K Surface mount resistor 0 063 watt 196 size 0603 10K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 10pF ceramic capacitor size 0603 10pF ceramic capacitor size 0603 AVX 33uF 16v surface mount Tantalum Farnell 301 8544 10uF 10V ceramic capacitor size 1206 10uF 10V ceramic capacitor size 1206 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 10nF ceramic capacitor size 0603 1uF 25V ceramic capacitor size 0805 AVX 33uF 16v surface mount Tantalum Farnell 301 8544 1uF 25V ceramic capacitor size 0805 0 22uF 25V ceramic capacitor size 0805 2 2uF 25V ceramic capacitor size 0805 0
28. l 4631869 HEAT6900 TX09D70Vm1CAA MIM 085 27 MIM 039 18 TURBINE AS MIM 085 11 SEMBLY MIM 031 17 MIM 031 18 MIM 039 12 MIM 039 02 MIM 039 14 MIM 039 16 MIM 039 17 Aavid Thermalloy heatsink TO220 type PF433 for U42 Hitachi 1 4 VGA colour TFT display MicroLab display holder PCB issue 1 0 2 off moulded turbine inner swirl plate 2 off moulded turbine outer swirl plate Transducer Body Reduced Cone Diameter Mouthpiece holder Jewelled fixed bearing M3 thread Jewelled sprung bearing M3 thread 27mm offset vane assembly 16 BI DIRECTIONAL TURBINE HOUSING MIM 101 00 CASE COMPONENTS Alt Part MIM 039 15 MIM 039 08 MIM 085 18 MIM 085 19 MIM 085 20 MIM 085 21 MIM 085 22 MIM 085 23 MIM 085 24 MIM 085 25 MIM 085 26 MIM 085 28 MIM 085 29 MIM 085 30 MIM 085 16 MIM 085 15 MEC Porti M400 SCW W 3 0 8 PRST30 ZC1D SCW 202101412KB30086 MIM 085 35 MOUSE ASSEMBLY SUNDRY ITEMS SWT 13083 PLG 509 6212 PSU MW 128RA1200F02 27mm Pivot Flow deflector plate 039 08 iss 1 3 MicroLab top moulding MicroLab bottom moulding MicroLab paper cover MicroLab display bezel MicroLab right hand panel MicroLab left hand panel 2 off MicroLab front feet 2 off MicroLab rear feet MicroLab hinged foot MicroLab paper feed key MicroLab on off key MicroLab help key Serial Number label 8 4 Volt 1 1A hr NiMH battery pack Woosim thermal
29. printer mechanism 6 off TR fastenings polymate 30 panhead screw posidrive 3x8mm zinc amp clear finish 6 off Harrison Silverdale polypast 30 screw panhead posidrive 3x8mm zinc amp clear finish Mini optical USB PS2 mouse available from PWM Farnell 4 pole 3 5mm jack plug Ault universal 15 volt mains adapter supplied by Craftec USB lead Three pole mains cable for destination country 17 Technical Support Great Britain and World Headquarters Micro Medical Ltd PO Box 6 Rochester Kent 2AZ Telephone 44 0 1634 360044 Fax 44 0 1634 360055 Web Site http www micromedical com uk Email support micromedical com uk Contact Micro Medical Ltd for the local agent in your region or country for local service Fault Analysis The following analysis is only a guideline and should be carried out in a logical sequence If the fault is still apparent after the following suggestions then the unit should be fault found using the circuit descriptions and circuit diagrams provided When the unit is turned on there is no display present Ensure charger is turned on at the mains FVC readings are low Remove turbine from transducer housing Taking the turbine move it slowly through the air and check that the vane is not sticking The unit does not recognise that the transducer is connected Ensure that the Bi directional transducer is correctly plugged into the MicroLab Inspect the Bi direct
30. ription R128 RES 68K0603 68K Surface mount resistor 0 063 watt 1 size 0603 R129 RES 33K0603 33K Surface mount resistor 0 063 watt 196 size 0603 12 R130 R131 R132 R133 R134 R135 R136 R137 R138 R139 R140 R141 R142 R143 R145 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 RES 330R0805 RES 100K0603 RES 100K0603 RES 100K0603 RES 100K0603 RES 100K0603 RES 100K0603 RES 0 1R0805 RES 33K0603 RES 10K0603 RES 100K0603 RES 100K0603 RES 100K0603 RES 100K0603 RES 100K0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 10PF0603 CAP 10PF0603 don t populate don t populate CAP TPSC336K16R0300 CAP 10UF 1206 CAP 10UF 1206 CAP 0 1UF0603 CAP 0 1UF0603 CAP 10NF0603 CAP 1UF0805 CAP TPSC336K16R0300 CAP 1UF0805 CAP 0 22UF0805 CAP 2 2UF0805 CAP 0 1UF0805 CAP 0 47UF0805 CAP 2 2UF0805 CAP 1UF0805 CAP TPSC336K16R0300 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP 0 1UF0603 CAP TAJD107K016R CAP 0 1UF0603 330R Surface mount resistor 0 063 watt 196 size 0805 100K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount res
31. rnal printer USB and RS232 interfaces mouse and transducer ports and all associated circuitry Supplied with the microcomputer is a Bi directional transducer disposable mouthpieces mains adapter nose clip and USB printer cable The MicroLab is powered by internal Nickel Metal Hydride cells or by the mains adapter supplied When testing a subject the Bi directional transducer is plugged into the microcomputer unit The Bi directional transducer is used to measure the subjects expired flow and volume in accordance with the operating manual Bidirectional Transducer The Micro Medical digital volume transducer consists of an acrylic tube with a vane positioned between two swirl plates The low inertia vane is attached to a stainless steel pivot that is free to rotate on two jewelled bearings mounted at the centre of the swirl plates As air is passed through the transducer a vortex is created by the swirl plates that causes the vane to rotate in a direction dependant upon the direction of airflow The number of rotations is proportional to the volume of air passed through the transducer and the frequency of rotation is proportional to the flow rate The transducer housing consists of a main body that contains a pair of light emitting diodes LED s and phototransistors The transducer is fixed to the mouthpiece holder that pushes into the main body and is captured by an O r
32. rtor SOT23 5 package U23 INC JS28F256P30B85 Intel NOR Flash TSOP56 14X20 package INC CY62167DV30LL U24 70ZXI Cypress 256Mbit SRAM 5 48 12X20 package U25 INC 24LC256I SN Microchip 256K EEPROM SO 8 package U26 INC MAX4544EUT T Maxim SPDT analogue switch SOT23 6 package U27 INC MAX4544EUT T Maxim SPDT analogue switch SOT23 6 package U28 INC BU4S584 Rohm individual CMOS Schmitt invertor SOT23 5 package U29 INC BU4S584 Rohm individual CMOS Schmitt invertor SOT23 5 package U30 INC MAX3378EEUD Maxim level translator TSSOP 14 package U31 INC BU4S584 Rohm individual CMOS Schmitt invertor SOT23 5 package U33 INC 4093 CMOS Quad NAND Schmitt input gate SO 14 package U34 INC BU4S81 Rohm individual CMOS AND gate SOT23 5 package U35 INC BU4S81 Rohm individual CMOS AND gate SOT23 5 package 040 0 OCFE TRPBF Linear Technology Battery Charging Circuit TSSOP16 package U42 INC LT1084CT TRPBF Linear Technology Voltage Regulator CPC Sellotape permanent double sided self adhesive pad U42 PAD 02910 12x25x1 5mm U43 INC LM555CM National Semiconductor 555 Timer IC SO 8 TR1 TRA DTC114EK High speed switching NPN transistor size SOT23 TR2 TRA FDN360P Fairchild Semiconductor P channel Mosfet size SOT 23 TR3 TRA FDN361AN Fairchild Semiconducter N channel Mosfet size SOT 23 TR4 TRA FDN360P Fairchild Semiconductor P channel Mosfet size SOT 23 TR5 TRA DTC114EK High speed switching NPN transistor size SOT23 TR6 TR7 TR8 TR9 TR10 TR11 T
33. size 0805 10K Surface mount resistor 0 063 watt 196 size 0603 10K Surface mount resistor 0 063 watt 196 size 0603 10K Surface mount resistor 0 063 watt 196 size 0603 10K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 10K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 10K Surface mount resistor 0 063 watt 196 size 0603 1R Surface mount resistor 0 063 watt 196 size 0603 1K Surface mount resistor 0 063 watt 196 size 0603 1R Surface mount resistor 0 063 watt 196 size 0603 1K Surface mount resistor 0 063 watt 196 size 0603 33K Surface mount resistor 0 063 watt 196 size 0603 33K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 100K Surface mount resistor 0 063 watt 196 size 0603 22K Surface mount resistor 0 063 watt 196 size 0603 22K Surface mount resistor 0 063 watt 196 size 0603 22K Surface mount resistor 0 063 watt 196 size 0603 Drawing No 085 00 Date 12 12 05 Revision No 1 2 Page 3 OF 7 Designation Part No F Farnell Description R63 RES 100K0603 100K Surface mount resistor 0 063 watt 196 size 0603 R64 RES 100K0603 100K Surface mount resistor 0 063 wat
34. t 196 size 0603 R65 RES 0 1R0805 0 1R Surface mount resistor 0 25 watt 1 size 0805 R66 RES 100K0603 100K Surface mount resistor 0 063 watt 196 size 0603 R67 RES 100K0603 100K Surface mount resistor 0 063 watt 196 size 0603 R68 RES 100K0603 100K Surface mount resistor 0 063 watt 196 size 0603 R69 RES 100K0603 100K Surface mount resistor 0 063 watt 196 size 0603 R70 RES 100K0603 100K Surface mount resistor 0 063 watt 196 size 0603 R72 RES 8 2R0805 8 2R Surface mount resistor 0 125 watt 196 size 0805 R73 RES 91K0603 91K Surface mount resistor 0 063 watt 196 size 0603 R74 RES 15K0603 15K Surface mount resistor 0 063 watt 196 size 0603 R75 RES 51K0603 51K Surface mount resistor 0 063 watt 196 size 0603 R76 RES 1K0603 1K Surface mount resistor 0 063 watt 1 size 0603 R77 RES 47K0603 47K Surface mount resistor 0 063 watt 1 size 0603 R78 RES 7 5K0603 7 5K Surface mount resistor 0 063 watt 1 size 0603 R79 RES 5 6K0603 5 6K Surface mount resistor 0 063 watt 1 size 0603 R80 RES 100K0603 100K Surface mount resistor 0 063 watt 1 size 0603 11 R81 R82 R83 R84 R85 R86 R87 R88 R89 R90 R91 R92 R93 R94 R95 R96 R97 R98 R99 R100 R101 R102 R103 R104 R105 R106 R107 R108 R109 R110 R111 R112 R113 R114 R116 R117 R119 R120 R121 R122 R123 R124 R125 R126 R127 RES 100K0603 RES 10K0603 RES 10K0603 RES 1M0603 RES 100K0603 RES 100K0603 RES 1 5K0603 RES 33R0603 RES 33R0603 RES 15K0603 RES 15K0603 RES 100K0603 RES 0 1
35. te 12 12 05 Revision No 1 2 Page 1 OF 7 Designation Part No F Farnell Description MIM 085 17 PCB ASSEMBLY U1 INC LH79520 Sharp 7 Microcontroller LOFP176 package INC LM809M3 3 08 U2 NOPB National Semiconductor Reset Circuit SOT 23 package U3 INC MM74HC4052M Dual 4 ch analog mlplex SO 16 package Farnell 3548892 U4 INC MAX1775EEE Maxim dual output step down converter QSOP16 package U5 NO UNDAE Maxim undervoltage sensing circuit SOT23 5 package U6 INC MAX1626ESA Maxim step down DC DC converter SO 8 package U8 04511 Rohm individual CMOS gate SOT23 5 package U9 INC MAX3221CAE Maxim RS232 transceiver SSOP16 package U10 INC DS1629S Maxim digital temp and RTC SO 8 package Farnell 3330023 U11 INC HD64F3687FP Hitachi microcontroller FP64E package U12 INC L6219DS Allegro Surface mount PWM Motor driver SOP24 package U13 INC MAX3378EEUD Maxim level translator TSSOP14 package U14 INC ADS7846E Texas Instruments Touch screen controller TSSOP16 package U15 INC MAX5465EXT Maxim digital Potentiometer SC70 package U16 Ge Linear Technology White LED Driver SOT 23 package U17 Ger 5ESSZTRPBF Linear Technology DC DC convertor SOT23 5 package U18 INC MAX5465EXT Maxim digital potentiometer SC70 package U19 INC LM4864MM Audio Power Amplifier MMSOP package U20 INC SL811HST AXC Cypress USB controller TQFP48 package U21 INC BU4S01 Rohm individual CMOS NOR gate SOT23 5 package U22 INC BU4S584 Rohm individual CMOS Schmitt inve
36. the on off button is pushed the unit should turn on The microcontroller can turn off the unit using OFF Holding the on off button down for 10 secs can also turn the unit off if necessary U5 is used to hold the unit off if the supply voltage is too low approximately 5 5V R24 and R25 divide the unregulated battery voltage which is applied to a spare A D channel in the touch screen driver The uC continuously examines the reading and gives a battery low or battery dead warning message Inductors L1 and L2 are placed for EMC filtering and D14 protects the unit from reverse polarity power supply Microlab8 Sensor Interface 085 04 2 Sensor ports are available for the unit to plug their transducers into eg Turbine SPO2 U30 is used to translate the levels from 3 3 to 5V U34 and U35 are used to buffer the receive line to the level translator This was found to be necessary for the SPO2 TR17 is used to switch the power on for MM Sensor 1 TR19 is used to switch the power on for MM Sensor 2 Keypad EEPROM MOUSE RTC RS232 085 05 Three buttons are available on the unit KEYO is the ON OFF button KEY is the HELP button is the PAPER FEED button U8 is used to generate an interrupt to the microcontroller if either the on off or help button is pushed The mouse is controlled by 2 data lines 4 lines come from the microcontroller to interface with these 2 lines U22 031 are inverting buffers and T
37. uF 25V ceramic capacitor size 0603 AVX 100uF 16v Surface mount Tantalum Farnell 197 348 0 1uF 25V ceramic capacitor size 0603 AVX 33uF 16v surface mount Tantalum Farnell 301 8544 0 1uF 25V ceramic capacitor size 0603 AVX 33uF 16v surface mount Tantalum Farnell 301 8544 0 1uF 25V ceramic capacitor size 0603 0 1uF 25V ceramic capacitor size 0603 Drawing No 085 00 Date 12 12 05 Revision No 1 2 Page 6 OF 7 Designation Part No F Farnell Description C108 CAP 0 1UF0603 0 1uF 25V ceramic capacitor size 0603 C109 CAP 1UF0805 1uF 25V ceramic capacitor size 0805 C110 CAP 10NF0603 10nF ceramic capacitor size 0603 C111 CAP 1UF0805 1uF 25V ceramic capacitor size 0805 C113 CAP TPSC336K16R0300 AVX 33uF 16v surface mount Tantalum Farnell 301 8544 C114 CAP TPSC336K16R0300 AVX 33uF 16v surface mount Tantalum Farnell 301 8544 C115 CAP TPSC336K16R0300 AVX 33uF 16v surface mount Tantalum Farnell 301 8544 C117 CAP 10UF 1206 10uF 10V ceramic capacitor size 1206 C118 CAP 1UF0603 1uF 25V ceramic capacitor size 0805 C120 CAP 10NF0603 10nF ceramic capacitor size 0603 C121 CAP 0 1UF0603 0 1uF 25V ceramic capacitor size 0603 C122 CAP 0 1UF0603 0 1uF 25V ceramic capacitor size 0603 C123 CAP 0 1UF0805 0 1uF 25V ceramic capacitor size 0805 C130 CAP 0 1UF0603 0 1uF 25V ceramic capacitor size 0603 D1 DIO BAT54C General purpose Dual Schottky diode Common Cathode D2 DIO BAT54C General purpose Dual Schottky diode Common Cathode D3 DIO ZHCS

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